Remove separate staff schema

Signed-off-by: Federico Busetti <[email protected]>

Author: febus982

auth_volumes/kratos/kratos.yml

@@ -124,8 +124,6 @@ hashers:
 identity:
   default_schema_id: default
   schemas:
-    - id: staff
-      url: file:///etc/config/kratos/staff.schema.json
     - id: default
       url: file:///etc/config/kratos/identity.schema.json